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In: Statistics and Probability

A study of smartphone users shows that 68% of smartphone use occurs at home and a...

A study of smartphone users shows that 68% of smartphone use occurs at home and a user spends an average of 410 minutes per month using a smartphone to interact with other people (Harvard Business review, January–February 2013). Consider the following data indicating the number of minutes in a month spent interacting with others via a smart- phone for a sample of 50 smartphone users.

353

458

404

394

416

437

430

369

448

430

431

469

446

387

445

354

468

422

402

360

444

424

441

357

435

461

407

470

413

351

464

374

417

460

352

445

387

468

368

430

384

367

436

390

464

405

372

401

388

367
  1. What is the mean number of minutes spent interacting with others for this sample? how does it compare to the mean reported in the study?

  1. What is the standard deviation for this sample?

  1. Are there any outliers in this sample?

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